Blocking Not Occurring for a Signature

Appendix E Troubleshooting

Troubleshooting the Appliance

Step 5 Telnet to the router and verify that a deny entry for the blocked address exists in the router ACL. Refer to the router documentation for the procedure.

Step 6 Remove the manual block by repeating Steps 1 through 4 except in Step 2 place no in front of the command.

sensor(config-net-gen)# no block-hosts 10.16.0.0

Enabling SSH Connections to the Network Device

If you are using SSH-3DES as the communication protocol for the network device, you must make sure you have enabled it on the device.

To enable SSH-3DES connections to the network device, follow these steps:

Step 1 Log in to the CLI.

Step 2 Enter configuration mode.

sensor# configure terminal

Step 3 Enable SSH-3DES.

sensor(config)# ssh-3des host blocking_device_ip_address

Step 4 Type yes when prompted to accept the device.

If blocking is not occurring for a specific signature, check that the event action is set to block the host.

To make sure blocking is occurring for a specific signature, follow these steps:

Step 1 Log in to the CLI.

Step 2 Enter signature definition submode.

sensor# configure terminal

sensor(config)# service signature-definition sig0

sensor(config-sig)#

Step 3 Make sure the event action is set to block the host.

Note If you want to receive alerts, you must always add produce-alertany time you configure the event actions.

sensor(config-sig)# signatures 1300 0 sensor(config-sig-sig)# engine normalizer sensor(config-sig-sig-nor)# event-actionproduce-alertrequest-block-hostsensor(config-sig-sig-nor)# show settings

normalizer

-----------------------------------------------

	event-action: produce-alertrequest-block-host default: produce-alertdeny
	-connection-inline
	edit-default-sigs-only
	-----------------------------------------------
	Cisco Intrusion Prevention System Appliance and Module Installation Guide for IPS 7.1

OL-24002-01		E-41
OL-24002-01		E-41

IPS4520K9 specifications

Cisco Systems has long been a leading player in network security, and its IPS (Intrusion Prevention System) series is a testament to its commitment to safeguarding digital environments. Among its notable offerings are the IPS4510K9 and IPS4520K9 models, both designed to provide advanced threat protection for mid-sized to large enterprise networks.

The Cisco IPS4510K9 and IPS4520K9 are distinguished by their cutting-edge features that help organizations defend against a myriad of cyber threats. These systems utilize a multi-layered approach to security, integrating intrusion prevention, advanced malware protection, and comprehensive visibility across the network.

One of the primary characteristics of the IPS4510K9 is its high performance. It boasts a throughput of up to 1 Gbps, making it suitable for environments that demand rapid data processing and real-time responses to threats. The IPS4520K9, on the other hand, enhances that capability with improved throughput of up to 2 Gbps, accommodating larger enterprises with heavier network traffic. These models are equipped with powerful processors that support complex signature matching and can intelligently distinguish between legitimate traffic and potential threats.

In addition to performance, both models are designed with scalability in mind. They can be easily integrated into existing Cisco infrastructures. This facilitates a seamless enhancement of security without causing significant interruptions to ongoing operations. Moreover, they offer flexible deployment options, allowing organizations to operate them inline or out of band depending on their specific needs.

The Cisco IPS4510K9 and IPS4520K9 leverage advanced detection technologies, utilizing a variety of signature types and heuristic analysis to detect known and unknown threats effectively. They are equipped with real-time alerting and reporting capabilities, giving security teams immediate visibility into potential breaches and enabling them to respond swiftly.

Furthermore, both models support a range of management options through the Cisco Security Manager, allowing for centralized administration, streamlined policy management, and enhanced monitoring capabilities. Automated updates ensure the systems remain current with the latest threat intelligence, vital for staying ahead of evolving cyber threats.

In summary, the Cisco Systems IPS4510K9 and IPS4520K9 represent powerful solutions for organizations seeking robust intrusion prevention capabilities. With their high performance, scalability, and advanced detection technologies, these systems are essential tools in the ever-changing landscape of cybersecurity, providing enterprises with the peace of mind needed to operate securely in today's digital world.

Cisco Systems IPS4520K9 manual Blocking Not Occurring for a Signature, Enable SSH-3DES

Models: IPS4520K9

Enabling SSH Connections to the Network Device

Step 3 Enable SSH-3DES.

Step 4 Type yes when prompted to accept the device.